The HostStats extension implements a special page "Special:HostStats" that outputs information about the wiki's hosting server.
The extension will run a set of commands based on the $wgHostStatsCommands parameter, which the output will be displayed as different sections in the "Special:HostStats" special page.

This extension, if misused, can potentially expose your server and put it at risk! Please use with extreme care and if in doubt, do not install.